US2562801A - Detent mechanism for recoil operated firearms - Google Patents

Detent mechanism for recoil operated firearms Download PDF

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Publication number
US2562801A
US2562801A US8174A US817448A US2562801A US 2562801 A US2562801 A US 2562801A US 8174 A US8174 A US 8174A US 817448 A US817448 A US 817448A US 2562801 A US2562801 A US 2562801A
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US
United States
Prior art keywords
breech
recoil
sear
block
movement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US8174A
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English (en)
Inventor
Maillard Bernard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brevets Aero Mecaniques SA
Original Assignee
Brevets Aero Mecaniques SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brevets Aero Mecaniques SA filed Critical Brevets Aero Mecaniques SA
Application granted granted Critical
Publication of US2562801A publication Critical patent/US2562801A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
    • F41A19/12—Sears; Sear mountings

Definitions

  • the present invention relates to release or detent mechanisms, i. e.
  • Its object is to provide a mechanism of this kind which is better adapted to meet the requirements of practice than those used 'up to this time.
  • I in order to reduce the violence of the shock due to the locking engagement of the movable part with the detent or catch means, I divide the mass of said means into at least two portions arranged and mounted in such manner as to be brought into motion successively in the course of said engagement with the movable part, whereby the force of inertia which opposes the living force of said part at the beginning of this engagement is only a portion of the total inertia forces brought into play for fully stopping said movable part.
  • a detent system capable, under the eiiect of the shock resulting from its engagement with the movable part, of undergoing a certain displacement against the action of elastic return means
  • said detent system to cooperate with a unidirectional shock absorbing device adapted to brake the motion due to this engagement, whereby said return means is relieved from most of the shock absorbing stresses and need, consequently, be only capable of overcoming the forces that oppose the return of the detent system and the movable part to the position that these elements occupied when they engaged each other.
  • Figs. 1 and 2 diagrammatically show, respectively in elevation and in plan View, withvparts in section, a detent mechanism according to the present invention
  • Fig. 3 shows in elevational section a modilcation of some elements of this system.V
  • afbreech recoil operated lfirearm includ-'- ing, among other parts, afbreech casing -I in which Ais mounted a movable breech 2 subjected to the action of a return spring (not shown) exerting thereon a high return force in the direction of arrow F (Figl).
  • the detent mechanism is 'made in the usual manner, including for instance a sear 3 adapted to come, under the action lof a spring 4, across the path of travel of ⁇ a projection or nose 5 carried by breech '2, a trigger 3a being provided for disengaging scar 3 from projection 5 when it is desired to nre a shot.
  • the violence of the shock in question is further reduced by dividing the mass of the-'sliding detent unit into at least two portions, to' wit the sear 3 proper on the one hand and a sliding block ii acting as a support ⁇ for said sear, on the other hand, these portions being 'arrangedand mounted in such manner asito be successively 'brought into ino'tion as breech 2 cooperates with soar 3.
  • the" relative'movement of sear 3 with respect to ⁇ block G when engaged by the breech, takes place in a direction parallel to the movement of Said breech.
  • I provide in said'sear an ovalfshaped oriiice 1 through which extends a pivot pin 8 mounted between two rearward projections 6 of block 6.
  • land -Il'I will be preferably chosen so as to be stronger than the breech return spring,'so that, once the locking engagement shock is absorbed, the whole f i, Y
  • shock absorbing device for instance of the hydraulic type, ⁇ may be constructed to absorb by of the detent unit and breech 2 is brought' back into the position for which projection came into contact with sear 3.
  • Elastic means 9 might work only during the first portion of the shock absorbing operation (in which case it should be interposed directly between sear 3 and block 6 and be of a strength lower :than that of elastic means I0 so that the latter will be compressed, as desired, only after ⁇ of vsaid shock absorbing operation, that is to say when elastic means I0 cornes in turn into action Ato brake-the movement of breech 2.
  • elastic means 9 and I0 will be arranged to bear, through one of their ends, upon breech casing I and through their other end, upon sear 3 (concerning means 9) or sear block 6 (concerning means I0) i1
  • sear 3 sear means 9
  • sear block 6 sear block 6
  • Elastic means I0 is then comprised of two helical springs mounted in two housings 6b provided on either side of bore 6a and closed on the side of :i:
  • a detent unit movable in said breech casing including at least one block slidably guided in said casing in a direction at least substantially parallel to the direction of movement of said breech and a sear movably interconnected with said block to be movable both transversely to said direction of movement, so as to engage said breech for stopping the counter-recoil movement thereof, and with a lost motion, in said direction of movement, the mass of said block constituting a substantial portion of the total mass of said detent unit, and means for limiting the motion of said block in the counter recoil direction.
  • a breech casing a breech slidable in said breech casing with a recoil and counter-recoil reciprocating motion, said breech being elastically urged in the counter-recoil direction
  • a detent unit movable in said breech casing including at least one block slidably guided in said casing in a direction at least substantially parallel to the direction of movement of said breech and a sear, means for movably interconnecting said sear with said block to make said sear movable transversely to said direction of movement so that it can engage said breech for stopping the counter-recoil movement thereof, said interconnecting means being arranged to provide a lost motion in said direction of movement, the mass of said block constituting a substantial portion of the total mass of said detent unit, and means for limiting the motion or said block in the counter-recoil direction.
  • a combination according to claim 1 further including a plate of ber interposed between said block and said breech casing.
  • a breech casing a breech slidable in said breech casing with a recoil and counter-recoil reciprocating motion, said breech being elastically urged in the counter-recoil direction
  • a detent unit movable in said breech casing including at least one block slidably guided in said casing in a direction at least substantialltT parallel to the direction of movement of said breech and a sear adapted to engage said breech for stopping the counter-recoil movement thereof, pin and slot interconnecting means between said block and sear the slot, provided in one of said two last mentioned parts. extending in said direction of movement and the pin.
  • a breech casing a breech slidable in said breech casing with a recoil and counter-recoil reciprocating motion, said breech being elastically urged in the counter-recoil direction
  • a detent unit movable in said breech casing including at least one block slidably guided in said casing in a direction at least substantially parallel to the direction of movement of said breech and a Sear movably interconnected with said block to be movable both transversely to said direction of movement, so as to engage said breech for stopping the counterrecoil movement thereof, and with a lost motion, in said direction of movement, the mass of said block constituting a substantial portion of the total mass of said detent unit, means for limiting the motion of said block in the counter-recoil direction, and elastic means for urging said detent unit in recoil direction.
  • a breech casing a breech slidable in said breech casing with a recoil and counter-recoil reciprocating motion, said breech being elastically urged in the counter-recoil direction
  • a detent unit movable in said breech casing including at least one block slidably guided in said casing in a direction at least substantially parallel to the direction of movement of said breech and a sear movably interconnected with said block to be movable both transversely to said direction of movement, so as to engage said breech for stopping the counter-recoil movement thereof, and with a lost motion, in said direction of movement, the mass of said block constituting a substantial portion of the total mass of said detent unit, means for limiting the motion of said block in the counterrecoil direction, unidirectional shock absorbing means for braking counter-recoil displacements of said detent unit with respect to said breech casing, and elastic means for returning said detent unit and breech

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Vibration Dampers (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US8174A 1947-02-24 1948-02-13 Detent mechanism for recoil operated firearms Expired - Lifetime US2562801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU274888X 1947-02-24

Publications (1)

Publication Number Publication Date
US2562801A true US2562801A (en) 1951-07-31

Family

ID=19732469

Family Applications (1)

Application Number Title Priority Date Filing Date
US8174A Expired - Lifetime US2562801A (en) 1947-02-24 1948-02-13 Detent mechanism for recoil operated firearms

Country Status (8)

Country Link
US (1) US2562801A (nl)
BE (1) BE480294A (nl)
CH (1) CH274888A (nl)
DE (1) DE851747C (nl)
FR (1) FR961367A (nl)
GB (1) GB636998A (nl)
LU (1) LU28346A1 (nl)
NL (1) NL79210C (nl)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776601A (en) * 1953-11-25 1957-01-08 Edward C Lee Sear device for an automatic firearm
US2776600A (en) * 1953-12-31 1957-01-08 Edward C Lee Sear device for an automatic firearm
US2805605A (en) * 1953-12-23 1957-09-10 Edward C Lee Sear device for an automatic firearm
US20100282064A1 (en) * 2006-05-17 2010-11-11 Wolfgang Bantle Locking systems for use with firearms

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179914A (en) * 1937-06-21 1939-11-14 Birkigt Marc Detent mechanism

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179914A (en) * 1937-06-21 1939-11-14 Birkigt Marc Detent mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776601A (en) * 1953-11-25 1957-01-08 Edward C Lee Sear device for an automatic firearm
US2805605A (en) * 1953-12-23 1957-09-10 Edward C Lee Sear device for an automatic firearm
US2776600A (en) * 1953-12-31 1957-01-08 Edward C Lee Sear device for an automatic firearm
US20100282064A1 (en) * 2006-05-17 2010-11-11 Wolfgang Bantle Locking systems for use with firearms
US8074556B2 (en) * 2006-05-17 2011-12-13 Heckler & Koch, Gmbh Locking systems for use with firearms

Also Published As

Publication number Publication date
CH274888A (fr) 1951-04-30
DE851747C (de) 1952-10-09
FR961367A (nl) 1950-05-11
NL79210C (nl)
GB636998A (en) 1950-05-10
BE480294A (nl)
LU28346A1 (nl)

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